Mothman (4e Creature)
From D&D Wiki
Mothmen are hideous amalgams looking like a cross between a humanoid and a giant moth. They stand 6 to 7 feet tall with humanoid shaped bodies, but bearing an insectoid head, claws, talons, and wings. The rest of its body is covered in short grey to black hairs. The mothman's composite eyes glow with an unearthly crimson light. Native to the Shadowfell these creatures feed on the psychic emanations caused by fear and death, and are often drawn to places that supply them with this "food". In some cases mothmen have a kind of second sight when it comes to this, and it has been noted that mothmen may arrive at a location just days or weeks before some horrible natural disaster strikes creating the emotions they need. This sense has drawn some mothmen out of the Shadowfell and into the natural world, in either case they will often make nests in old abandoned structures, waiting for the suffering they must feed on.
 Mothman Tactics
The mothman will remain invisible until it finds the best time to strike and will then dive down and attack targets with Swooping Claws, hoping to gain surprise. At the start of the next round the mothman will use Night Gaze, attempting to strike as many targets as possible. After this it will continue to make Swooping Claws attacks, and use Feast of Fear as it can. Although naturally fearless if a mothman is reduced to 1/4 hit points or less, it will flee combat attempting to use its Natural Invisibility to escape.
 Mothman Lore
A character knows the following information with a successful Arcana check.
DC 10: Mothmen are believed to be humans who centuries ago fled to the Shadowfell to practice vile magics connected to the Far Realms. Something went horribly wrong and those humans transformed into the mothmen, cursed to live in shadow and feed on suffering.
DC 20: Mothmen make their lairs in old forgotten ruins or buildings, they seem to know when disaster will soon strike and their homes are temporary nests near the locations of these future catastrophes. Once the events occur they leave the area heading toward the next place that suffering will soon occur. They have also been known to lair near dangerous monsters, or even haunt soon to be battlefields, waiting for their food. Some peoples (Dark Ones in particular) view mothmen as "good" omens, as their presence warns them that something terrible is about to happen and that they may prepare. A few people have even constructed shrines or monuments to them, showing their great respect for the "protection" they give. Many say that a Mothman was the "dark angel from the endless heavens" that visited the prophet Corbius on the Island of Fear to warn him of the Age of Worms.
DC 25: Mothmen are immune to spells or powers that cause fear, and can become invisible in dim or dark light.